And to quantify pollution: the study looks at reducing 10 micron particulate pollution in China down to the EPA-approved limits, which almost all US cities are

And to quantify pollution: the study looks at reducing 10 micron particulate pollution in China down to the EPA-approved limits, which almost all US cities are already below, and which Chinese cities are often 2-3 times above. I tried to take a serious stab at "what does this mean for air in the US?", and my best conclusion is "probably almost nothing". The full notes are here: https://news.ycombinator.com/item?id=18231784 https://news.ycombinator.com/item?id=18231784